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19 January, 2016 - 16:37
Table 1.5 Classification of pollutants by state of matter and chemical composition

Major causes

Subclasses

Typical examples

Control methods

Particulates

Solids

Dust, smoke, fumes, fly ash, Pb

Sedimentation, centrifugation, impaction, filtration, fabric filters, electrostatic precipitator, wet scrubber

 

Liquids

Mist, spray

 

Gases (organic)

Hydrocarbons (HCs)

Hexane, benzene, ethylene, methane

Adsorption, absorption, stripping, condensation, combustion
 

Aldehydes and ketones

Formaldehyde, acetone

 
 

Other organics

Actone, chlorinated hydrocarbons

 

Gases (inorganic)

Oxides of carbon

CO, CO2

 
 

Oxides of sulfur

SO2, SO3

 
 

Oxides of nitrogen

NO2, NO3

 
 

Other inorganics

O3, H2S, HF, NH3 , Rn